Door-locking attachment



T. J. RYAN DQOR LOCKING ATTACHMENT Filed June 27 1925 INVENTOR vATTORNEYS Patented Oct. 26, 192$.

UNITE TIMOTHY Josnrn RYAN, or nondLAs, ARIZONA.

noon-noonrne ATTACEMENT.

Application filed June 27, 1925. Serial No. 40,027.

This invention relates to key rings and has for its principal object theconstruction of a combination article having the func tions both of akey ring and theft foil. the latter function being brought into play byhanging the key ring upon the shank of the door knob with an openableportion thereof extended to a position in which it passes through theeye of a key turned crosswise in the keyhole of the lock with which theknob is associated, thereby preventing the key being turned, bymanipulation from the opposite side of the door, to a position in whichit can be forced out from the keyhole and another key inserted forunauthmizedly unlocking the door.

Other objects of the invention will appear as the following descriptionof an illustrative embodiment thereof proceeds,

In the drawings,

Figure 1 is a perspective view showing a door lock with the device of myinvention in operative position as a theft foil.

Figures 2 and l are respectively side and end views in elevation of thekey ring, with the keeper extended.

Figure 3 is a vertical elevation showing the device with the keeperclosed;

Referring now in detail to the several [igures, my novel key ringconsists preferably of two parts, an open band portion 1 upon which thekeys are strung, and a keeper 2 hingcdly joined thereto by means such asthe pivot 3. The free end of the keeper is preferably latchablyengageable with the adjacent and of the band portion 1, and while thelatching means may be of any desired construction, Thave shown the freeend of the keeper bifiu'cated to form resilicnt lips t, the latter beingperforated, as indicated at- 5, and springing over elevations (3 formedon. the flattened faces 7 at the end of the band portion 1, when thekeeper is snapped into closed position by pressure of the thumb.Cooperating shoulders 8 and 9 on the portion 1 and keeper 2 act as alimit stop to prevent the keeper moving too far inward.

Itis preferred to make the curvature of the band portion 1 re-entrant atan intermediate point 10, so as to define two distinct lobes or loops 11and 12. The slight elevation formed at the point 10 is of value inassisting to segregate in one of said loops certain keys which the userof the device may separate from the body of keys on the other loop. inhis hunt for the desired key 1' 7 hen it is-desired to use the key ringas a theft foil, the keeper is moved to an en tended position in whichit may be passed through the eye of a key turned crosswise in thekeyhole when the key ring is hung by the loop 11, upon the door knob. Ashas been stated in an earlier paragraph, this prevents the key beingturned with the eye parallel to the keyhole, in which position it mightbe pushed out of the keyhole, by one working from the opposite side ofthe door.

It will be noted in the drawings that the keeper is located to one' sideof a vertical line passing through the point of suspen-. sion of the keyring from the door knob, and that both the keeper and the adjacent partsof the band portion 1 are relatively massive.

Ordinarily this would have a tendency to tilt the key ring and displacethe keeper from its position within the eye of the key, particularly ifthe keeper were loosely pivoted. This tendency is overcome, however, inthe present invention by making the loops 11 and 12 olfset, as shown,the vertical line through the point of suspension of the key ringdividing the loop 12 into unequal parts, of which the greater is on thatside of said line remote from the keeper. This has the effect that inthe ordinary gravital disposition of the keys upon the loop 192, one ortwo more of the keys will hang from the farther side of said loop thanfrom side adjacent the keeper, counterbalancing the weight of the keeperand associated parts so that the position of the key ring shown in thedrawings (Figs. 1. and 2) is its position of repose.

It is to be understood that numerous changes and alterations may be madein the shape and arrangement of the several parts, or in thesubstitution of mechanical equivalents for features herein shown and described, without departing from the scope of the appended claim.

I claim:

A key ring including a band portion open at one side and therebyproviding upper and lower ends of the band portion, the lower end of theband portion being offset from the upper end, a keeper pivotally mountedon the oli'set lower end, said band position at an acute angle to thevertical passing through the pivoted point of the 15 keeper so that thekeeper may be inserted within an eye of a key when the key is placd in alock for preventing turning of the key in one direction, the upper loopof the band portion being adapted to he engaged around the shank of: aknob for supporting the key ring in position when the keeper has beenlocated in the eye of: a key.

TIMOTHY JOSEPH RYAN.

